Cutting method
a cutting method and cutting technology, applied in the field of cutting methods, can solve the problems of extended machining time, deterioration of machining accuracy, cost rise, etc., and achieve the effects of reducing the area of direct solid contact between the rotary tool and the chips, prolonging the life of the tool, and suppressing the abrasion of the rotary tool
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first embodiment
[0021]FIGS. 1A to 1C are illustrative views of a tip region of a main shaft of a machining center or the like for carrying out a cutting method according to the present invention. Reference numerals 1 and 2 denote a spindle that rotates by being driven by a motor, and a tool holder, respectively. The tool holder 2 is mounted with a rotary tool 3. In this case, the method is explained with an example of plunge milling in which the rotary tool 3, which has a circular cutting edge 4 (shown in FIG. 2), is moved toward a minus side in a Z direction while being rotated to cut an outer face of a work W to a predetermined depth. After cutting the outer face of the work W, the rotary tool 3 is retreated toward a plus side in the Z direction after the cutting of the work W, and then the rotary tool 3 is moved toward a plus side in a Y direction to cut the work W toward the minus side in the Z direction again. It should be noted that the rotary tool 3 is provided with a device (not shown) for ...
second embodiment
[0028]In this second embodiment of the present invention, as shown in FIG. 4, a rotational center axis of the rotary tool 3 is inclined at α° with respect to a cutting direction, namely, the Z direction.
[0029]When the rotary tool 3 is thus inclined, the outflow direction of the chips 6 is changed toward the plus side in the Y direction as shown in FIG. 5. Thus, in this embodiment of the present invention, the outflow direction of the chips 6 and the rotational direction of the rotary tool 3 are set opposite to each other to perform cutting. A region in the vicinity of a point where the chips 6 separate from the cutting face 5 of the rotary tool 3 is a sphenic shape. Therefore, the rotary tool 3 is rotated oppositely to the outflow direction of the chips 6, and the cutting fluid is thereby drawn in in the sphenic manner through the curling of the chips 6. As a result, the dynamic pressure effect is likely to be achieved.
[0030]However, in this case as well, the condition for achieving...
third embodiment
[0032]In this third embodiment of the present invention as well as the second embodiment of the present invention, the rotary tool is inclined to perform cutting. In this case, however, as shown in FIG. 6, groves 7, 7, . . . 7, which are arranged at predetermined intervals in a direction intersecting with a concentric circle of the cutting edge, namely, in a radial direction, are formed on an outer peripheral side in the cutting face 5 of a rotary tool 3a along the entire circumference thereof, through laser beam machining. These grooves 7 have a width of about 3 μm, a depth of about 2 μm, and a length of about 800 μm from the cutting edge. The distance between any two adjacent ones of the grooves 7 is about 20 μm.
[0033]The rotary tool 3a having the grooves 7 thus formed in the cutting face 5 thereof is used to perform cutting. Thus, the cutting fluid is likely to be retained by the cutting face 5. As a result, the dynamic pressure effect is likely to be created between the cutting ...
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Abstract
Description
Claims
Application Information
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